80 



ARKIV FÖR BOTANIK. BAND 14. N:0 9. 



Plate Fig. Page 



Plagiogramma Gregorianum Grev 57 



Pleurosigma angulatum Quek 7 



Podosira dubia (Kütz.) Grün 64 



— glacialis Grün C4 



— hormoides v. glacialis Grun 64 



— Montagnei Kütz 64 



— Montagnei Kütz. v. minor Grun 64 



Pyxilla baltica Grun 61 



Rhabdonema arcuatum (Ag.) Kütz. v. maxima n. var. . . 3 66 59 



— mimitum 0str 59 



— Oestrupii n. sp 3 67 59 



Rhizosolenia Calcar avis Schultze 60 



— eriensis Lev 60 



— eriensis L. H. Smith v. europaea Hust 60 



— longiseta Zach 60 



— longiseta Zach. v. Levanderi n. var 60 



— minima Lev 60 



— setigera Btw 61 



Rhoicosphenia ciirvata Kütz. v. linearis n. var 38 



— fossilis n. sp 2 48 38 



Rhopalodia parallela (Grun.) O. M 53 



Sceptroneis gemmata Grun 57 



— marina (Greg.) Grux 57 



— sp 4 96 57 



Schizonema lacustre Ag 18 



Scoliotropis septentrional is n. sp 1 5 10 



Skeletonema costatum (Grev.) Cl 62 



Stauroneis (Pleurostauron) parvula v. prominula Grun. . 16 



— septentrionalis Grun 16 



Stephaiiodiscus Niagarae Grun 3 72 67 



— pulcherrimus A. Cl 66 



Striatella groenlandica 0str 59 



Surirella biseriata Bréb 47 



— biseriata Bréb. v. bifrons (Ehb.) Kütz 47 



— Capronii Bréb 48 



— distinguenda n. sp 3 59 48 



— elegans Ehb 49 



— flexuosa Ehb 50 



— fossilis n. sp 3 61 49 



— Gamma Ehb 49 



— laevis n. sp 3 60 49 



— Lindbergii n. sp 3 62 49 



— nana n. sp 4 93 50 



— norvegica Eulenst 49 



— ovalis Bréb. v. Crumena (Bréb.) 48 



— robusta Ehb. v. marginata n. var 3 58 47 



— slesvicensis Grun 49 



— spiralis Kütz 50 



